I claim the ornamental design for a sensor assembly for touch-free faucet, as shown and described.
FIG. 1 is a perspective view of a first embodiment of a sensor assembly for touch-free faucet;
FIG. 2 is a front elevation view of the first embodiment of the sensor assembly for touch-free faucet;
FIG. 3 is a rear elevation view of the first embodiment of the sensor assembly for touch-free faucet;
FIG. 4 is a left elevation view of the first embodiment of the sensor assembly for touch-free fuacet;
FIG. 5 is a right elevation view of the first embodiment of the sensor assembly for touch-free faucet;
FIG. 6 is a top plan view of the first embodiment of the sensor assembly for touch-free faucet; and,
FIG. 7 is a bottom plan view of the first embodiment of the sensor assembly for touch-free faucet.
The broken lines showing a portion of the faucet are included for the purpose of illustrating a portion of the faucet that forms no part of the claimed design.